Remove old h264 decoder

It hasn't been used in a long time.

Bug: 69351196
Test: build
Change-Id: Ib9b88c94deaa1019df1e5382f9e32c2aaff50bd3
Merged-In: Ib9b88c94deaa1019df1e5382f9e32c2aaff50bd3
403 files changed